I dont know where the $200 for parts comes from..the diaphrams are $64 for the pair on each side (from Mohawk). My locking components (rollers and brake shaft) were fine...so ..where is the other $140.00 ?

Don't know, I was quoting Cliff...

"I would hate to spend $200.00 for a full rebuild kit and then find it was a major ordeal and as we all kow sometimes it easier to let the rebuilders do it. And of course I get a 1 year warranty from them."

Personally, I'd buy rebuilt. Never even priced the parts to rebuild one. Steers and tags I would rebuild in a second. Just too much to screw up in a DD3. It's worth it o me to have someone else rebuild it. I replaced my left side last year with a rebuilt.

I dont know where the $200 for parts comes from..the diaphrams are $64 for the pair on each side (from Mohawk). My locking components (rollers and brake shaft) were fine...so ..where is the other $140.00 ?

Chuck,

That was what I was quoted for a COMPLETE rebuild kit or what Bendix replaces when they rebuild one.

Sounds like a case for disassembling the chamber and see what you need? I'd probably use the complete kit so that issue would not have to be revisited. However, if I found the rest to be in good condition, may just go wiith the flexible parts. Mechanix choice! Post some pix of what you find in the can. I'd like to see exactly what it looks like before mine cause problems. I have one new chamber (probably rebuilt) but the other looks a little "original" but they work great...for now. NJT was pretty good about keeping the brakes in good condition. Cliff, you still planning on coming up to Timmonsville? Hope so! Cheers, JR

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JR Lynch , Charlotte, NC87 MC9, 6V92TA DDEC, HT748R ATEC

"Every government interference in the economy consists of giving an unearned benefit, extorted by force, to some men at the expense of others.”

Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body. But rather to skid in sideways, chocolate in one hand, a good Reisling in the other, body thoroughly used up, totally worn out and screaming: WOO HOO, what a ride

Cliff, I vote for disassembling the unit and seeing what needs replacing. If it's just a diaphram and a spring or two, you'd likely pay less than $100 for parts to DIY without too much effort. If there's a lot of work to do in there, rust/corrosion, etc., put it back together and send it in as the core for the rebuilt can (and warranty) for the $400.

The biggest thing to watch for is damage around the sealing rings. If they're chipped or gouged at all, go ahead and pony up for a rebuilt can.

For the kinds of work you've done on your conversion, you obviously have the skills to rebuild one of these. Whether you have the time, is another thing. And whether you're comfortable doing the job (life safety, etc.) is something else. And only you can answer those questions.

Cliff, Just my personal touch on this subject, if Sonnie Gray can take off his DD3 cans and install regular spring brake cans and system and he had driven over 30,000 miles if I recall for sure, then I say to heck with these bandits with the high priced DD3 which are antiquated and just plan suck.

You know I love to rebuild things and save $$ but I believe these DD3's are not worth the price they have put on them and absolutely refuse to use them. I would rather use a 2 X 4 through the floor board that the wife can pull on when we need to slow down. (A little humor there). Again, there is not one, not even one excuse I can accept why these DD3 are so expensive. Let them eat them as far as I am concerned. I will change every valve, every air line, and every brake can to run with spring brakes and take that to the bank on my 1973 model 05!!

Now this is my personal position on this, enough is enough to me for this high priced stuff. If I could come up with a safe, rebuild of these cans for all to consider doing with instructions I would do it in a hear beat to help anyone save the money. I cannot accept even one excuse for the cost!!

Good luck in your decision buddy, just make a safe decision for you and family. Gary

First off, I'm not directing this at you specifically, Gary. But this issue with DD3's comes up on the boards every so often. So for the DD3 neighsayers, I say, take one apart sometime and you'll see why they're so expensive. It's not only 'supply and demand' at work making these cans so pricy... there's a lot of engineering at work in a DD3 can... not just a big fat spring that can kill somebody from taking apart a spring brake without caging it.

Better yet, pull the emergency brakes at speed in a DD3 coach compared to one with spring brakes and you'll see how much better air stops a coach than springs. A DD3 is a redundant airbrake, folks. And those extra set of airbrakes cost more than a set of big springs. Why act like it's a consipracy or something?

There's a reason MCI and GMC spec'd these things long after spring brakes were found on every other piece of heavy machinery... safety. And $400 a can is a small price to pay for that, friends.

And for those that moan about their DD3 systems not working properly... fix 'em. These systems worked in day-to-day revenue hauling service for decades and millions upon millions of miles, given proper maintenence and upkeep. Spend a weekend and a few bucks getting your system working to proper specs. and the system could outlive you.

There's no way in heck I'd willingly trade out my DD3's for springs. No way.

Yes, Sonnie did replace his DD3s with spring brakes. But he also installed a CAT engine and removed the bogies replading them with a tag axle. He is way ahead of me in engineeering and modifying abilities. Jack